What is mastering?

Mastering is the last stage in the process of putting a track (or release) out, adding the final polish to ensure that it sounds the best that it can in all possible playback situations and making sure that it fits together seamlessly so the sound doesn’t vary from track to track.
Online mastering gives you access to Abbey Road’s world class facilities from anywhere on the planet, and after submitting a track it will be assigned to the most suitable engineer for the job and returned in whatever format your prefer – as a downloadable file or by post on CD or Vinyl.